opposite
pendant
bi-
mate
fellow
ducks
twos
deuces
interpair
bidual
half and half
intrapair
double
up
couple
combinedly
in between
other
either
'tween
between
amphi-
biune
codual
shake over
tandemwise
duodecillionth
dual
binary
duad
dispair
co-
adhibit
tooth
coalternate
interden
gemel
compresent
counterpart
dicomplemented
one-half
half
better
thirdhand
corelation
every other
complement
go-together
homobivalent
mediety
doublet
moiety
correlative
correlated
at once
coexistent
correlate
bipartite
intercombine
fiercen
dia-
para-
bet
fasten
geminate
twinstick
unmatch
affine
homodisubstituted
speak
twi-
atwix
betune
jugate
repair
twin
pair
alongside
two of a kind
duo-
intercomplementary
one little duck
down the middle
pairbonded
marriage
pygopagus
latter
go hand in hand
cohomotopy
tandemly
in half
down to
comparable
crosslinkage
opposite
interpair
intrapair
double
up
biune
codual
tandemwise
binary
coalternate
interden
gemel
compresent
dicomplemented
every other
homobivalent
dual
correlative
correlated
correlate
bipartite
geminate
affine
homodisubstituted
jugate
twin
intercomplementary
pairbonded
comparable
half and half
combinedly
in between
'tween
between
tandemwise
thirdhand
at once
tandemly
pendant
mate
fellow
ducks
twos
deuces
bidual
couple
other
duodecillionth
dual
duad
counterpart
one-half
half
better
corelation
complement
go-together
mediety
doublet
moiety
coexistent
twinstick
pair
two of a kind
one little duck
marriage
pygopagus
latter
cohomotopy
crosslinkage
shake over
dispair
adhibit
tooth
intercombine
fiercen
fasten
unmatch
speak
repair
go hand in hand
adj
- the other one of a complementary pair
- being directly across from each other; facing
- moving or facing away from each other
- altogether different in nature or quality or significance
- characterized by opposite extremes; completely opposed
adj
noun
- a word that expresses a meaning opposed to the meaning of another word, in which case the two words are antonyms of each other
- a relation of direct opposition
- a contestant that you are matched against
- something inverted in sequence or character or effect
adv
noun
- One of a pair; a counterpart.
- A short rope hanging down, used to attach hooks for tackles; a pennant.
- A lamp hanging from the roof.
- A piece of jewellery which hangs down as an ornament, especially worn on a chain around the neck.
- A long narrow flag at the head of the principal mast in a royal ship.
- The dangling part of an earring.
- An ornament of wood or of stone hanging downwards from a roof.
- A supporting post attached to the main rafter.
- The stem and ring of a watch, by which it is suspended.
prefix
noun
- one of a pair
- the officer below the master on a commercial ship
- a fellow member of a team
- the partner of an animal (especially a sexual partner)
- a person's partner in marriage
- an exact duplicate
- South American holly; leaves used in making a drink like tea
- informal term for a friend of the same sex
- South American tea-like drink made from leaves of a South American holly called mate
- a chess move constituting an inescapable and indefensible attack on the opponent's king
verb
adj
noun
adv
noun
- A mixture of half lemonade and half iced tea.
- A mixture of cream and milk often used in coffee, defined by the US Food and Drug Administration to contain between 10.5% and 18% milk fat.
- Both oral sex and vaginal sex performed in sequence by a prostitute
- A cup of coffee with the equivalent of half a packet of sugar and half a creamer of cream.
- A combination of both rice and chips as an accompaniment to a curry, as opposed to one or the other.
- A mixture of two alcoholic beverages, most frequently those brewed from malt, such as porter and ale or mild and bitter beers, in about equal parts; also used for equal parts of an alcoholic beverage and water.
- A pizza with two different sets of toppings, one on each half.
- A person of mixed race or with dual nationality.
- A combination of beer and ale (or similar alcoholic drinks) in equal quantities.
adj
adj
adj
- Made up of two matching or complementary elements.
- Folded in two; composed of two layers.
- Having two aspects; ambiguous.
- False, deceitful, or hypocritical.
- Stooping; bent over.
- Of flowers, having more than the normal number of petals.
- Of twice the quantity.
- Of time, twice as fast.
- Of a family relationship, related on both the maternal and paternal sides of a family.
- Designed for two users.
- Of an instrument, sounding an octave lower.
verb
- To get a two-base hit.
- To act as substitute for (another theatrical performer in a certain role, etc).
- To serve a second role or have a second purpose.
- To turn sharply, following a winding course.
- To increase by 100%, to become twice as large in size.
- To fold over so as to make two folds.
- To operate as a double agent.
- To be the double of; to exceed by twofold; to contain or be worth twice as much as.
- (often followed by together or up) To join or couple.
- To be capable of performing (upon an additional instrument).
- To play (both one part and another, in the same play, etc).
- To double down.
- To multiply by two.
- (sometimes followed by up) To clench (a fist).
- To make a call that will double certain scoring points if the preceding bid becomes the contract.
- To transmit simultaneously on the same channel as another station, either unintentionally or deliberately, causing interference.
- To multiply the strength or effect of by two.
- To duplicate (a part) either in unison or at the octave above or below it.
- To unite, as ranks or files, so as to form one from each two.
- To repeat exactly; copy.
- To sail around (a headland or other point).
- To go or march at twice the normal speed.
- To cause (a ball) to rebound from a cushion before entering the pocket.
adv
noun
- The narrow outermost ring on a dartboard.
- Twice the number, amount, size, etc.
- A ghostly apparition of a living person; a doppelgänger.
- A two-base hit.
- A strike in which the object ball is struck so as to make it rebound against the cushion to an opposite pocket.
- Playing the same part on two instruments, alternately.
- A sharp turn, especially a return on one's own tracks.
- Synonym of double-quick (“fast marching pace”)
- A bet on two horses in different races in which any winnings from the first race are placed on the horse in the later race.
- A double-precision floating-point number.
- A former French coin worth one-sixth of a sou.
- A call that increases certain scoring points if the last preceding bid becomes the contract.
- A double feast.
- A redundant item for which an identical item already exists.
- A tile that has the same value (i.e., the same number of pips) on both sides.
- A person who resembles and stands in for another person, often for safety purposes
- Two competitions, usually one league and one cup, won by the same team in a single season.
- A drink with two portions of alcohol.
- A hit on this ring.
- A boat for two scullers.
- The feat of scoring twice in one game.
- The feat of winning two events in a single meet or competition.
- A copper coin worth one-eighth of a penny.
adj
- Said of the higher-ranking pair in a two pair.
- Traveling towards a major terminus.
- At university (especially Oxford or Cambridge).
- Aloft.
- Larger; greater in quantity, volume, value etc.
- Functional; working.
- Raised; lifted.
- Above the horizon, in the sky.
- well-known; renowned
- Awake and out of bed.
- Willing; ready.
- Indicating a larger or higher quantity.
- Headed or designated to go upward (as an escalator, stairway, elevator etc.) or toward (as a run-up).
- Finished, to an end
- On or at a physically higher level.
- Chilled and served without ice.
- Erect.
- Ahead; leading; winning.
- Happening; new; of concern. See also what's up, what's up with.
- Facing upwards.
- Well-informed; current.
- In a good mood.
- Built, constructed.
- Fitted or fixed at a high or relatively high position, especially on a wall or ceiling.
- Available to view or use; made public; posted.
- Riding the horse; mounted.
- Standing; upright.
- Next in a sequence.
adv
- Away from the surface of the Earth or other planet; in opposite direction to the downward pull of gravity.
- Aside or away, so as no longer to be present or in use.
- Towards or at a central place, or any place that is visualised as 'up' by virtue of local features or local convention, or arbitrarily, irrespective of direction or elevation change.
- To or from one's possession or consideration.
- To or at a physically higher or more elevated position.
- Used as an aspect marker to indicate a completed action or state; thoroughly, completely.
- To or in a position of equal advance or equality; not short of, back of, less advanced than, away from, etc.; usually followed by to or with.
- Towards the principal terminus, towards milepost zero.
- In a positive vertical direction.
- North.
- Against the wind or current.
- To a higher level of some quantity or notional quantity, such as price, volume, pitch, happiness, etc.
- Without additional ice.
- Relatively close to the batsman.
prep
- From south to north of.
- At (a given place, especially one imagined to be higher or more distant from a central location).
- From the mouth towards the source of (a river or waterway).
- Further along (in any direction).
- Of a man: having sex with.
- Toward the center, source, or main point of reference; toward the end at which something is attached.
- Toward the top of.
noun
- The direction opposed to the pull of gravity.
- An up quark.
- An upstairs room of a two story house.
- A positive thing, or a time or situation when things are going well.
verb
noun
- Two of the same kind connected or considered together.
- A small number.
- That which joins or links two things together; a bond or tie; a coupler.
- A couple-close.
- Two partners in a romantic or sexual relationship.
- One of the pairs of plates of two metals which compose a voltaic battery, called a voltaic couple or galvanic couple.
- A turning effect created by forces that sum to zero in magnitude but produce a non-zero external torque.
adj
det
verb
adv
prefix
adj
verb
noun
- Of an item that is one of a pair, the other item in the pair.
- Of a vector in an inner product space, the linear functional corresponding to taking the inner product with that vector. The set of all duals is a vector space called the dual space.
- The dual number.
- Of a regular polyhedron with V vertices and F faces, the regular polyhedron having F vertices and V faces.
adj
- Pertaining to two, pertaining to a pair of.
- Characterized by having two (usually equivalent) components.
- Pertaining to a grammatical number in certain languages that refers to two of something, such as a pair of shoes.
- Exhibiting duality.
- Being the dual of some other category; containing the same objects but with source and target reversed for all morphisms.
- Being the space of all linear functionals of (some other space).
verb
adj
- Having two equally important parts; related to something with two parts.
- Of an operation, function, procedure, or logic gate, taking exactly two operands, arguments, parameters, or inputs; having domain of dimension 2.
- Focusing on two mutually exclusive conditions.
- Concerning logic whose subject matter concerns binary states.
- Being in one of two mutually exclusive states.
- Of data, consisting coded values (e.g. machine code) not interpretable as plain or ASCII text (e.g. source code).
- Concerning numbers and calculations using the binary number system.
noun
- Synonym of binary asteroid.
- Synonym of binary star.
- Synonym of binary file; a file consisting of data other than human-readable text.
- Synonym of binary planet.
- The bijective base-2 numeral system, which uses only the digits 0 and 1.
- A state in which only two values are possible, in which something must have one value or the other.
verb
noun
- An irreducible component of a comb that intersects the handle in exactly one point, that point being distinct from the unique point of intersection for any other tooth of the comb.
- A hard, calcareous structure present in the mouth of many vertebrate animals, generally used for eating.
- The rough surface of some kinds of cel or other films that allows better adhesion of artwork.
- A pointed projection from the margin of a leaf.
- A projection on the edge of a gear that meshes with similar projections on adjacent gears, or on the circumference of a cog that engages with a chain.
- A sharp projection on the blade of a saw or similar implement.
- Liking, fondness (compare toothsome).
- A projection or point in other parts of the body resembling the tooth of a vertebrate animal.
adj
noun
- Either of two parts that fit together, or complement one another.
- One who or that which resembles another.
- A duplicate of a legal document.
- One who or that which has corresponding functions or characteristics.
- Either half of a flattened fossil when the rock has split along the plane of the fossil.
verb
noun
- the superior one of two alternatives
- something superior in quality or condition or effect
- someone who bets
- a superior person having claim to precedence
verb
adj
- (comparative and superlative of `well') wiser or more advantageous and hence advisable
- more than half
adv
- comparative of `well'; in a better or more excellent manner or more advantageously or attractively or to a greater degree etc.
- from a position of superiority or authority
adj
noun
- either of two parts that mutually complete each other
- a word or phrase used to complete a grammatical construction
- a complete number or quantity
- number needed to make up a whole force
- something added to complete or embellish or make perfect
- one of a series of enzymes in the blood serum that are part of the immune response
verb
noun
- A pair of two similar or equal things; couple.
- A very small flowering plant, Dimeresia howellii.
- Either of two dice, each of which, when thrown, has the same number of spots on the face lying uppermost.
- A man’s waistcoat.
- A man’s close-fitting jacket, with or without sleeves, worn by European men from the 1400s to the 1600s.
- A word (or rather, a halfword) consisting of two bytes.
- One of two or more different words in a language derived from the same etymological root but having different phonological forms (e.g., toucher and toquer in French or shade and shadow in English).
- An imitation gem made of two pieces of glass or crystal with a layer of color between them.
- A quantum state of a system with a spin of ½, such that there are two allowed values of the spin component, −½ and +½.
- In textual criticism, two different narrative accounts of the same actual event.
- A word or phrase set a second time by mistake.
- A word ladder puzzle.
- An arrangement of two lenses for a microscope, designed to correct spherical aberration and chromatic dispersion, thus rendering the image of an object more clear and distinct.
- Dipole antenna.
adj
prefix
prefix
- between
- avoiding or avoidant
- beside, alongside
- near
- abnormal
- resembling
- false
- In isomeric benzene derivatives, having the two substituents in opposite (1,4) positions (compare ortho- and meta-)
- disability sport
- around, surrounding
- adjacent, next to
- unrecognized, unauthorized, or unsanctioned
- across, through, throughout
- parachute.
- incorrect
- above, over
- beyond
- opposite of, on the far side of
- related or pertaining to
- affecting or concerning lower body
prep
verb
- To stake or pledge upon the outcome of an event; to wager.
- To be sure of something; to be able to count on something.
- To place money into the pot in order to require others do the same, usually only used for the first person to place money in the pot on each round.
intj
- Expression of general agreement or acceptance.
- Exclamation of joy at good fortune.
- Exclamation indicating acceptance of a challenge or an absurd proposal.
noun
noun
adj
- Of two materials, having mutual affinity.
- Of or pertaining to a function expressible as f(⃑x)=A⃑x+⃑b (where A is a linear transformation and ⃑b is a constant), which, regarded as a transformation, maps parallel lines to parallel lines and finite points to finite points.
- Assigning finite values to finite quantities.
noun
verb
verb
- To utter.
- To communicate with one's voice, to say words out loud.
- To understand (as though it were a language).
- To have a conversation.
- To produce a sound; to sound.
- To be able to communicate in a language.
- Of a bird, to be able to vocally reproduce words or phrases from a human language.
- To deliver a message to a group; to deliver a speech.
- To be able to communicate in the manner of specialists in a field.
- To communicate or converse by some means other than orally, such as writing or facial expressions.
- To communicate (some fact or feeling); to bespeak, to indicate.
noun
prefix
prep
prep
adj
adj
noun
- A twin size mattress or a bed designed for such a mattress.
- A room in a hotel, guesthouse, etc. with two beds; a twin room.
- A twin crystal.
- Either of two similar or closely related objects, entities etc.
- A two-engine aircraft.
- Either of two people (or, less commonly, animals) who shared the same uterus at the same time; one who was born at the same birth as a sibling.
verb
- To split, part; to go away, depart.
- To separate, divide.
- To join, unite; to form links between (now especially of two places in different countries); to pair with.
- To be, or be like, a pair of twins (for example, to dress identically); to be paired or suited.
- To give birth to twins.
- To be, or be like, a twin to (someone else); to match in some way.
noun
- One of the constituent items that make up a pair.
- A couple of working animals attached to work together, as by a yoke.
- A boat for two sweep rowers.
- A score of zero runs (a duck) in both innings of a two-innings match.
- Used with binary nouns (often in the plural to indicate multiple instances, since such nouns are plural only, except in some technical contexts)
- A double play, two outs recorded in one play.
- The exclusion of one member of a parliamentary party from a vote, if a member of the other party is absent for important personal reasons.
- Two similar or identical things taken together; often followed by of.
- Two members of opposite parties or opinion, as in a parliamentary body, who mutually agree not to vote on a given question, or on issues of a party nature during a specified time.
- In a mechanism, two elements, or bodies, which are so applied to each other as to mutually constrain relative motion; named in accordance with the motion it permits, as in turning pair, sliding pair, twisting pair.
- A doubleheader, two games played on the same day between the same teams
- A poker hand that contains two cards of identical rank, which cannot also count as a better hand.
- A pair of breasts
- A pair of testicles
- Two people in a relationship, partnership or friendship.
verb
- To engage (oneself) with another of opposite opinions not to vote on a particular question or class of questions.
- To group into one or more sets of two.
- To bring two (animals, notably dogs) together for mating.
- To suit; to fit, as a counterpart.
- To come together for mating.
- to link two electronic devices wirelessly together, especially through a protocol such as Bluetooth
prefix
noun
noun
- A joining of two parts.
- The union of two people of opposite sex, to the exclusion of all others.
- A close union.
- In solitaire or patience games, the placing a card of the same suit on the next one above or below it in value.
- A union of two or more people that creates a family tie and carries legal, social, and/or religious rights and responsibilities.
- A wedding; a ceremony in which people wed.
- A king and a queen, when held as a hand in some versions of poker or melded in pinochle.
- The state of being married.
- A homosexual relationship between male prisoners.
- The union of only two people, to the exclusion of all others.
- My grandparents' marriage lasted for forty years.
English words for 'the other one of a complementary pair'
As you may have noticed, above you will find words for "the other one of a complementary pair". Hover the mouse over the word you'd like to know more about to view its definition. Click 
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Not believed
multiple star
homepage
A confused noise
absent
halcyon times of peace
different thing
to preordain
time after time
Not convertible
starlight
tomography
tending to repel and not absorb water
predicate noun
silent contemplation
doubling back
pretending not to know
tit for tat
traitorly
to be in a slump
treason.
streamline
named for the Isle of Portland.
to play around.
a streamlet
haunting
boxer
during the day
fluorine
Plenty
incumbent.
strong interaction
dice cup
derby (match)
looking after
comedy
truck
music box
taking no notice of
showing disapproval
carte blanche
to imply.
A city in Nebraska
procurement
social work
treatise
prank
laboratory
vulgarity
remote